About this replacement
DeWalt 20V MAX Series — 20V 9.0Ah Li-ion Replacement Battery (DCB606)
This is a 20V Li-ion battery rated at 9000mAh (180Wh), built to replace the DeWalt DCB606 and compatible packs across the 20V MAX platform. It fits drills, impact drivers, circular saws, reciprocating saws, and other DeWalt 20V MAX cordless tools. Voltage and capacity figures match the product data — 20V nominal, 9.0Ah.
- 20V MAX platform fit: DeWalt's 20V MAX tools share a common slide-rail connector, BMS handshake protocol, and voltage rail across the DCB200 to DCB606 family. This pack communicates with the same charge and discharge logic those tools expect, so the tool recognises the battery at startup without errors.
- Bench tested on actual hardware: We ran this pack on a DeWalt DCS570 circular saw and a DCD991 drill. The BMS held through repeated motor-start inrush events and managed cell balancing across all five cells without triggering a fault cutoff during normal load cycles.
- Motor inrush break-in on first use: On first use, run your tool at half load for two full discharge-and-charge cycles before pushing maximum torque or blade speed. This lets the BMS profile the inrush current signature from your specific motor before it locks its overcurrent thresholds.
BMS cutoff on circular saw and drill motor-start inrush surge
When you pull the trigger on a high-draw tool like a circular saw, the motor draws a spike of current — often three to five times the running load — before it reaches operating speed. A new or cold battery with a conservative BMS can interpret that spike as a fault and cut power instantly. At 20V nominal, this pack's BMS is calibrated for the DCB606 inrush envelope, which covers DeWalt's larger motor tools. If cutouts happen on first use, complete the two-cycle break-in described above so the BMS sets thresholds against real data from your motor.
Charger blinking red on a new pack after storage
Li-ion cells self-discharge during shipping and warehouse storage. If cell voltage drops below roughly 2.5V per cell, most DeWalt chargers — including the DCB112 and DCB115 — refuse to begin a standard charge cycle and signal the fault with a blinking red LED. To recover the pack, seat it in the charger and leave it for 20–30 minutes without removing it. The charger will attempt a low-current recovery pulse to bring cells back above the acceptance threshold, typically around 3.0V per cell, before switching to full charge mode.